ground floor

n. (英)底层, 有利的地位与时机

例句与用法：

Reg had got in on the ground floor, and as the firm had progressed, so had he.

雷吉参与了这个公司的创办，公司发展了，他也获利了。

The telephone was in the little study on the ground floor.

电话在底楼的小书房里。

The upstairs rooms are much warmer than those on the ground floor.

楼上的房间要比底层的暖和得多。

The plan of the ground floor is completely symmetrical.

一楼的平面图是完全对称的。

详细释义：

ph.

1. (建筑物的)底层

2. 【英】公共汽车的下层

3. 【口】(企业、组织等的)开始阶段; (企业等最初参加者所享有的)优先获利机会